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Finding the Fourth Proportional to 388,457.02, 536,080.72 and 218,697.22

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Solution

The fourth proportional to 388,457.02, 536,080.72 and 218,697.22 is: 301,807.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,457.02 : 536,080.72 = 218,697.22 : x
  2. Step 2: Convert to fraction form
    388,457.02/536,080.72 = 218,697.22/x
  3. Step 3: Cross multiply
    388,457.02x = 536,080.72 × 218,697.22
  4. Step 4: Simplify right side
    388,457.02x = 117,239,363,159.60
  5. Step 5: Solve for x
    x = 117,239,363,159.60/388,457.02
  6. Step 6: Final answer
    x = 301,807.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.